Restrictions schema collection returns Restrictions or filters for supported Provider-Specific schema collections. For example Tables Schema Collection supports 3 restrictions which will result in three rows.

Column Name	Data Type	Description
CollectionName	String	The name of Provider-Specific schema collection that these restrictions apply to. Note that Common Schema Collections do not support Restrictions.
RestrictionName	String	The name of the restriction in the collection.
RestrictionDefault	String	The content of this column should be ignored.
RestrictionNumber	Int32	The actual location in the schema collection's restrictions array. That is 1 corresponds to very first element of the array, 2 corresponds to the second element of the array and so forth.